:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;--accent: #f59e0b;--accent-dim: #b45309;--correct: #22c55e;--wrong: #ef4444}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.shell{min-height:100vh;display:grid;place-items:center;padding:2rem}.card{max-width:32rem;width:100%;border:1px solid rgba(255,255,255,.1);padding:2rem;border-radius:.75rem;background:#ffffff05}.tag{display:inline-block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.65rem;letter-spacing:.22em;text-transform:uppercase;color:#ffffff8c;border:1px solid rgba(255,255,255,.12);padding:.25rem .5rem;border-radius:.25rem}h1{margin:0 0 .75rem;font-size:1.5rem;font-weight:600;letter-spacing:-.02em}p{margin:0;color:#ffffffa6;font-size:.95rem}.btn{display:inline-block;margin-top:1.5rem;padding:.65rem 1.5rem;border:none;border-radius:.5rem;background:var(--accent);color:#000;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .2s}.btn:hover{background:var(--accent-dim)}.start-card p{margin-bottom:.25rem}.progress-row{display:flex;gap:.5rem;margin-bottom:1rem}.options{display:flex;flex-direction:column;gap:.5rem;margin-top:1rem}.option{display:flex;align-items:center;gap:.75rem;width:100%;padding:.75rem 1rem;border:1px solid rgba(255,255,255,.12);border-radius:.5rem;background:#ffffff08;color:#fafafa;font-size:.95rem;cursor:pointer;text-align:left;transition:border-color .2s,background .2s}.option:hover:not(:disabled){border-color:var(--accent);background:#f59e0b0f}.option:disabled{cursor:default}.option-letter{display:inline-flex;align-items:center;justify-content:center;width:1.75rem;height:1.75rem;border-radius:50%;border:1px solid rgba(255,255,255,.15);font-size:.8rem;font-weight:600;flex-shrink:0}.option.correct{border-color:var(--correct);background:#22c55e1a}.option.correct .option-letter{background:var(--correct);color:#000;border-color:var(--correct)}.option.wrong{border-color:var(--wrong);background:#ef44441a}.option.wrong .option-letter{background:var(--wrong);color:#fff;border-color:var(--wrong)}.fact-box{margin-top:1rem;padding:.75rem 1rem;border-radius:.5rem;background:#f59e0b14;border:1px solid rgba(245,158,11,.2)}.fact-box p{color:#fffc;font-size:.9rem}.result-card{text-align:center}.score-text{font-size:2.5rem;font-weight:700;color:var(--accent);margin:.5rem 0!important}.score-bar{width:100%;height:.5rem;border-radius:999px;background:#ffffff14;margin:1rem 0;overflow:hidden}.score-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent-dim),var(--accent));transition:width .6s ease}.result-msg{margin-top:.5rem}